| Identification | More | [Name]
4,5-Dimethylthiazole | [CAS]
3581-91-7 | [Synonyms]
4,5-DIMETHYL-1,3-THIAZOLE
4,5-DIMETHYLTHIAZOLE
FEMA 3274
FEMA NUMBER 3274
4,5-dimethyl-thiazol
4 5-DIMETHYLTHIAZOLE 97+%
4,5-Dimethylthiazole,98%
dimethylthiazole,4,5-dimethylthiazole
Thiazole, 4,5-dimethyl-
4,5-DIMETHYL THIAZOLE FEMA NO.3274
4,5-Dimethylthiazole ,99% | [EINECS(EC#)]
222-703-3 | [Molecular Formula]
C5H7NS | [MDL Number]
MFCD00005336 | [Molecular Weight]
113.18 | [MOL File]
3581-91-7.mol |
| Chemical Properties | Back Directory | [Appearance]
Colorless to light yellow liqui | [Melting point ]
83-84 C | [Boiling point ]
158 °C/742 mmHg (lit.) | [density ]
1.07 g/mL at 25 °C(lit.)
| [FEMA ]
3274 | [refractive index ]
n20/D 1.521(lit.)
| [Fp ]
124 °F
| [storage temp. ]
Sealed in dry,Room Temperature | [form ]
solid | [pka]
pK1:3.73 (25°C,μ=0.1) | [Specific Gravity]
1.070 | [Odor]
at 0.10 % in dipropylene glycol. roasted nutty fishy green boiled shrimp | [Odor Type]
fishy | [Detection Methods]
GC,NMR | [JECFA Number]
1035 | [BRN ]
105694 | [LogP]
2.09 | [CAS DataBase Reference]
3581-91-7(CAS DataBase Reference) | [NIST Chemistry Reference]
Thiazole, 4,5-dimethyl-(3581-91-7) |
| Safety Data | Back Directory | [Hazard Codes ]
Xn,Xi,F | [Risk Statements ]
R10:Flammable.
R22:Harmful if swallowed.
R37/38:Irritating to respiratory system and skin .
R41:Risk of serious damage to eyes.
R36/37/38:Irritating to eyes, respiratory system and skin . | [Safety Statements ]
S16:Keep away from sources of ignition-No smoking .
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S39:Wear eye/face protection .
S37/39:Wear suitable gloves and eye/face protection .
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection . | [RIDADR ]
UN 1993 3/PG 3
| [WGK Germany ]
3
| [RTECS ]
XJ4380000
| [HazardClass ]
3 | [PackingGroup ]
III | [HS Code ]
29349990 |
| Hazard Information | Back Directory | [Chemical Properties]
4,5-Dimethyl thiazole has a roasted nutty, meaty, boiled poultry-like odor | [Chemical Properties]
Colorless to light yellow liqui | [Occurrence]
Reported found in peanuts, toasted oats, malt, peach, pork, coffee, krill, shrimp and scallops | [Uses]
4,5-Dimethylthiazole was used in the preparation of 4-(bromomethyl)-5-(dibromomethyl)thiazole. | [Definition]
ChEBI: 4,5-Dimethylthiazole is a member of thiazoles. | [Preparation]
From methyl-α-bromoethyl ketone; by oxidation of 2-mercaptothiazoles with hydrogen peroxide in aqueous solution;
from 2-mercapto-4,5-dimethylthiazole. | [Aroma threshold values]
Detection: 470 ppb | [Taste threshold values]
Taste characteristics at 5 ppm: fishy, amine and pyridine-like with shrimp and savory nuances | [Synthesis Reference(s)]
The Journal of Organic Chemistry, 6, p. 764, 1941 DOI: 10.1021/jo01205a011 | [General Description]
Radical bromination of 4,5-dimethylthiazole using N-bromosuccinimide in the presence of 2,2′-azobisisobutyronitrile yields mono-, tri- and tetrabromo compounds. |
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